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Welcome to AX84® the base camp for tube (valve) electronics hobbyists.

AX84 exists to provide:

1) A great environment to learn about music-related electronics in general. AX84 is a place where those with experience are interested in helping diligent beginners who are willing to do their homework.

2) A place where those with more experience can field their ideas to peers and get useful feedback.

3) An environment that respects the past, but is not enslaved by it. INNOVATION IS GOOD (and it didn't die in the 1950s.) There are new things under the sun every day. Move the ball forward!

Our HUGE discussion area is under 'Discussion Forum' to your left.

We are hard at work improving the site- check back often!

Recent Forum Threads
"My Mesa Mark-style preamp build"
Posted By EeroNiemela on 09/19/2014

I just completed my latest build, a Mesa Mark II C+ -inspired tube preamp. The original idea is by bancika, who also posts here from time to time, this is his site:


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"Free Backing Tracks"
Posted By RickTown on 09/18/2014
Hey All,

Occasionally, I'll be on youtube watching gear demos or song covers or lessons, and I'll often read questions in the comments asking where to get the backing tracks.

I feel bad for all...

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"PCB rev 4 sockets don 't fit"
Posted By DutchMarco on 09/17/2014
Hi all,

I (at very long last) took to finishing my Ffly Rev 4 PCB build, and I discovered that the pins for the tube sockets don't align with the PCB-holes. Now, what I could do obviously, is


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"Most complicated documented build?"
Posted By jlaustill on 09/17/2014
Anyone have any links to any seriously complicated builds people have done? I'm curious what people have managed to accomplish after building my own frankenstein amp :) . I've seen some 2 channel am...

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"Anyone have experience building a Gainclone?"
Posted By Darren Porter on 09/17/2014
I am thinking of building a Gainclone solid-state stereo power-amp. I've found plenty of workable schematics but I am having trouble finding a power transformer for a reasonable price. Any suggestions...

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Updates: Thu, Sep 18th, 2014 @ 19:34:32
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Site News

2012-2-25: Winter is almost over. What's on your workbench?

2011-10-10: Some good discussions about LTSpice in the forums again, as well as suggestions on what all to do to a P1-eXtreme.

2011-10-10: What all can you do with a P1-extreme? check the forum

2011-10-7: Don't forget to like us on Facebook!

2011-08-11: Posted some Single-Ended Lead clips in the Classic Amp Projects->SEL section. Hundreds built but now we've got clips. Check out the archived projects section for more clips.

2010-10-22: Be sure to check out our discussion forum using the link on the left..

2009-07-01: The Treasure Fleet is on the way to Rio De La Hacha with a fortune in gold!

We're looking for media clips of recent builds... please stop by the forum and respond to the thread.

2008-10-4: Archived Projects section is functional again.

2008-9-18: RSS Feeds for the forum have been up for a while, but not advertised...
* Active Threads
* New Threads
* Recent Posts

2008-6-26: Want to participate in our discussion forums? You are welcome to read and lurk as you like. If you think you'd like to post with regularity, please sign up for an account.

AX84® is a registered trademark of Doberman Music Products, LLC. AX84.COM content may not be reproduced without the express written consent of Doberman Music Products, LLC (sales@dobermanamps.com).
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